Window lock



Jan. 8, 1946. T. HANNON WINDOW LOCK Filed April 23, 1945 mwwwmwww lNvENToR To/ber Hanno/7 BY@ /fzzacf H15 ATTORNEY Patented Jan. 8, 1946 UNITED STATES PATENT OFFICE WINDOW LOCK 'Tolbert Hannon; San Francisco, Calif.'

Application AprilwZS, 1945, Serial No. 589,731

4 Claims.

My inyention'relatesrto window'locking means, and particularly tol va device;.operable-tol lockl .or tolimit opening movement of one orA both vof a pair of movable window sashes'.

It is among 'the/objects'of my invention to providefa window ylock by which a window :sash may Jbe :lockedin closed position, andI which may be readilyl adjusted. to permit limited opening movement lof theiwindow whilelocking it. against pening movement beyond .a predetermined posivon.

Another object `is to: provide meansfor .shielding'and supporting a :einble'lockingchain across thefrmeeting .edges ofrrelatively movable window sashesto prevent .tampering-with the chain Afrom outside ther window,r andto .prevent interferencev with the movement of the sashes; within the range oiup'ermitted movement.

My invention possesses other objects and features of value, some of which with the foregoing will be set forth in the following description of the invention. It is to be understood that I do not limit myself to the showing made by the said description and the drawing as I may adopt variant forms of the invention within the scope of the appended claims.

In the drawing: y

Figure 1 is a/vertical section through the meeting rails of a pair of window sashes, the locking device of my invention being applied thereto and shown in side elevation.

Figure 2 is an inside front elevation of the locking device and portions of the window sashes of Figure 1, drawn upon a smaller scale, and shown in partially open position.

In terms of broad inclusion, the window locking device of my invention comprises a chain secured at one end to an upper sash and adjustably engageable with chain engaging means upon the companion lower sash. A guard is provided for shielding and supporting the chain between its points of attachment to the sashes; and means is provided for stacking slack portions of the chain to prevent interference thereby with the movement of the sashes to their closed positions.

In terms of greater detail, the window lock of my invention comprises a chain I secured to a chain mounting plate 2 attachable to the lower rail 3 of a movable window sash 4, as for example the upper sash of a pair of relatively movable window sashes, by screws or other suitable securing means 5. The chain I is preferably linked to an upturned lug 6 projecting angularly from the plate 2 adjacent one end thereof.

A chain engaging hook 'I is mountable upon a member `8` withrespect to which the 'sash rail 3 is movable. As illustrated in the drawing, the member 8 is the upper rail of a window sash 9 associated with the sash .4 as vthe lower sash of a pair. Afiixed sill may be utilized for mounting the hook `I if desired. Preferably the hook I is provided with a base Ill arranged to seat against the rail vand to. be lsecured thereto by suitable screws or @other securing means. The bodyl of vthe hook isV preferably disposed in a substantially horizontal` plane, and may advantageously be provided with an o'iset portion '.I I forming' `a detent wherebythe chainmay bev held taut after being moved onto the hook from Vthe side.

A guard I2 carried .by a base plate I3 is arranged to be secured to the top of the rail l, as by screws I4. A shield portion I5, preferably of trough-shaped `cross-section, extends transversely across* the meeting edges of the rails 3 and 8 and overhanging the chain mounting plate 2. The shield portion I5 only slightly clears a ilange I6 which extends upwardly along the edge of the plate 2 adjacent the meeting edges of the sash rails. 'I he shield I5 is substantially aligned with the hook l, while the lug 6 to which the chain I is secured is laterally offset therefrom, as shown in Figure 2.

For locking the sashes 4 and 9 in their closed positions, the chain I is extended from the plate 2 through the shield I5 to the hook I. The chain is drawn taut, and the nearest link is moved onto the hook 1. By moving the engaged link of the chain past the detent II, the chain is effectively tightened and retained in locking engagement with the hook. So placed, the chain eifectually locks both sashes against movement relative to each other. In Figure 1, the chain I is shown in engagement with 'the hook l, but not yet moved p-ast the detent I I for locking the sashes in closed position.

When it is desired to lock the sashes in a partially open position, the chain I is moved into engagement with the hook 1 at a selected point along the length of the chain' such as to allow an amount of slack in the chain suflicient to permit the desired degree of relative movement of the sashes to an open position as shown in Figure 2.

.So fastened, the chain permits either sash to be moved until the slack in the chain is taken up, and then locks the sash against further movement. This permits the window to be opened at top or bottom, or both top and bottom, sufficiently to afford desired ventilation while locking the sashes against movement suiiicient to permit a prowler to gain access to the room.

I6, over which the shield I5 extends, aids in pro- Y tecting the chain Ij and also serves to retain the chain upon the top of the rail 3, and out of the space between the rails 3 and 8 as the sashes are moved from a partially open to a vclosed position.

' Y This retention of the chain is materially aided by positioning the chain attaching lug 6 in oirset relation. rI'hus, assuming the sashes are to bei.

closed from a partially open position as shown in Figure 2, the chain lays itself in successive short loops back and forth behind the flange IB until the sashes reach the desired relation and Vthe slack is taken up. The successiveV Vloops are stacked in back of the flange I6, thereby preventing the chain from being caught between the approaching rails 3 and ilVA andpreventing complete closurej: Y i Y I' claim: Y

l; A lock for relatively movable upper and lower sashes comprising a chain mounting plate for Y the lower rail of the upper sash, a hook'for the upper rail of the lower sash, a chain secured at one end to the plate and adjustably engageable with the hook at a selected point along the chain for limiting relative movement Vof the sashes, and a chain guard mountable upon the lowerrsash and overhanging the chain mounting plate for at one end to the plate and adjustably engagesupporting and shielding the chain between the able with the hookV at a selected point along the chain' for limiting relative movement' ofV vthe sashes, the chain being secured to the plate at a point laterally offset from the point of engagement of the chain'to thehook, a flange upwardly extending along the plate between the point of attachment of the chain thereto and the hook, and a chain guard mountable Vupon the" lower sash and over-hanging the ohain-mountingplate for supporting and shielding the chain between the plate and the hook. 4. A lock for relatively movable upper and lower-sashesA comprising a' 'chain mounting plate for the lower rail of the upper sash, a hook for the upper rail of the lower sash, said hook having an offset portion for'resisting displacement ofthe chain-therefrom, a chain secured 'at one end to the plate and adjustably engageable with. the hook at a selected point along the chainfor limiting vrelative movement of the sashes, and a chain guard mountable upon the, lower sash and overhanging the chain mounting plate for supporting and :shielding the' chain between the plate and the hook. f

TOLBERT HANNON. 

